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Multiple constituents, big bores oxide Jiekong material preparing method

A technology of mesoporous materials and oxides, applied in molecular sieve compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as single structure, small pore size, and few types of materials

Inactive Publication Date: 2005-05-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, international standards for single oxides, composite oxides, phosphates, borates and ABO 3 The exploration of the synthesis and application of mesoporous materials is still in its infancy, and there are not many types of materials obtained, only a few of which are titanium oxide, aluminum phosphate, titanium phosphate and silica aluminum oxide.
The structure is also relatively simple, and the pore size is mostly small (<4nm)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, the synthesis of mesoporous titanium oxide with two-dimensional hexagonal structure: 1 gram of surfactant P123 was dissolved in 10-30 grams of ethanol, and stirred for 0.5-1 hour. Add 3 millimoles (mmol) of titanium tetrachloride (TiCl 4 ) and 7 millimoles (mmol) ethyl titanate (Ti(OC 2 h 5 ) 4 ), continue stirring for 5-12 hours. Transfer the reaction mother liquor to a petri dish, and volatilize at 20-50°C until dry to form a film. After 1-2 days, after the product is completely dry, put it in a muffle furnace and bake it at 380°C for 10 hours to obtain the desired material. The pore size of the material is 5.2nm and the specific surface area is 230m 2 / g.

Embodiment 2

[0023] Example 2, synthesis of mesoporous niobium oxide with three-dimensional hexagonal structure: 1 gram of surfactant F127 was dissolved in 10-30 grams of ethanol, and stirred for 0.5-1 hour. Add 7 millimoles (mmol) niobium pentachloride (NbCl 5 ) and 3 millimoles (mmol) ethyl niobate (Nb(OC 2 h 5 ) 5 ), continue stirring for 5-12 hours. Transfer the reaction mother liquor to a petri dish, and volatilize at 20-50°C until dry to form a film. After 1-3 days, after the product is completely dried, put it in a muffle furnace and bake it at 450°C for 10 hours to obtain the desired material. The pore size of the material is 6.1nm and the specific surface area is 180m 2 / g.

Embodiment 3

[0024] Example 3, synthesis of mesoporous titania silicon oxide with three-dimensional cubic structure: 1 gram of surfactant F108 was dissolved in 10-30 grams of ethanol, and stirred for 0.5-1 hour. Add 4 millimoles (mmol) titanium tetrachloride (TiCl 4 ) and 6 millimoles (mmol) ethyl silicate (Si(OC 2 h 5 ) 4 ), continue stirring for 5-12 hours. Transfer the reaction mother liquor to a petri dish, and volatilize at 20-50°C until dry to form a film. After 2-3 days, after the product is completely dried, it is placed in a muffle furnace and fired at 550°C for 10 hours to obtain the desired material. The pore size of the material is 7.4nm and the specific surface area is 360m 2 / g.

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PUM

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Abstract

The invention relates to a class of multi-component large-aperture oxide mesoporous materials synthesized by "acid-base pair" compatibility self-regulation and a preparation method thereof. The preparation process of this type of material is: first, uniformly mix the surfactant and the volatile organic solvent; then add the inorganic source (including metal source, phosphorus source, boron source, etc.) After being placed in the middle, the organic solvent was evaporated to dryness; after the surfactant was removed by calcination, the desired large-pore multi-component mesoporous oxide material was obtained. This type of material has a highly ordered pore structure, large and uniform pore size, large specific surface and pore volume; compared with traditional methods, it not only greatly expands the composition range and structure type of mesoporous materials, but also greatly improves the mesoporous materials. thermal stability of the material. The shape of the material is powder, monolithic, film, fiber, various patterns and the shape of plant stems and leaves with large pores.

Description

technical field [0001] The invention belongs to the technical field of inorganic advanced materials and catalysis, and specifically relates to a class of large-diameter oxide mesoporous materials with different pore structures and compositions and a preparation method thereof. technical background [0002] Ordered mesoporous materials synthesized with amphiphilic molecular surfactants as structure-directing agents have an important impact on materials science and are increasing year by year. On the one hand, they have a high specific surface (up to 2000m 2 / g), uniform and adjustable pore size (2-40nm) and regular pore arrangement, so they have very wide application value in the fields of separation, catalysis, electromagnetic materials, micro devices and chemical sensing; on the other hand, in Material synthesis and property design based on molecular dynamics, organic-inorganic micro-domain energy and organic-inorganic interface interactions, including biomineralization, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B37/00
Inventor 田博之刘晓英杨海峰余承忠屠波赵东元
Owner FUDAN UNIV